"Everything points to a manmade catastrophe," one environmental expert tells CBS News, as 100 tons of dead fish are removed from the Oder River.
The mass die-off of fish in the Oder River is an ecological catastrophe and it is not clear yet how long it will take the river to recover, German Federal Minister of the Environment Steffi Lemke said on Sunday.
Lemke spoke at a news conference alongside her Polish counterpart, Anna Moskwa, after a meeting in Szczecin, a Polish city on the Oder River.
The Oder runs from Czechia to the border between Poland and Germany before flowing into the Baltic Sea.
Ten tonnes of dead fish were removed from it last week, but Mokswa said the cause of the mass die-off